Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7f5ed167ad6832…

MALICIOUS

PDF

35.4 KB Created: 2020-08-11 01:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dea82bbb2e7b4204ff95c2dfed97af0 SHA-1: f4c110bab4e6a10406e65eddd5d2469e9962003c SHA-256: cd7f5ed167ad6832789226405a850c428f3f22ab5b62f99f37d0b5edd7caf8e0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=creative+writing+worksheets+for+grade+3+pdf', is designed to redirect users to malicious content. The document also contains a large number of external PDF links, many pointing to Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. The primary attack pattern is social engineering through a deceptive lure.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=creative+writing+worksheets+for+grade+3+pdf
    • http://mijurira.alessiakockel.com/uploads/1/3/1/4/131438641/1453397.pdf
    • http://files.manolositalianrestaurant.com/uploads/1/3/1/4/131483148/fozifetatutuvajuka.pdf
    • http://files.ccpdiscoveryschool.com/uploads/1/3/2/7/132711999/tudozitariboletokas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fodafozisejuleluz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/80128530129.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/pallet_playhouse_plans.pdf
    • https://cdn.shopify.com/s/files/1/0445/5625/5396/files/95520715405.pdf
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/norivaxosimijanep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7212/7125/files/96340313155.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/28238917631.pdf
    • https://cdn.shopify.com/s/files/1/0431/0152/0029/files/40779990487.pdf
    • https://cdn.shopify.com/s/files/1/0433/4505/1797/files/ruzarepijitewulevinanoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/pajusu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/m._ed_psychology_books_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ab5.bin
c299509fcec1380bf878f7a08a66bfa810b32ef481f927f3bcb7797fb11abab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AB5 5556 bytes
font_01_sfnt_off00005db3.bin
d0153d9f9d1467e447c2556e7c8e129892408c30873d56f91cde73648b6a032a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB3 10200 bytes

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